Umbrella stand



FIG. 1 is an exploded top perspective view an umbrella stand;

FIG. 2 is a top perspective view of the design of FIG. 1, in an assembled configuration;

FIG. 3 is a top view thereof;

FIG. 4 is a top perspective view of an umbrella stand according to a second embodiment;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a side view of the design of FIG. 4.

The broken lines shown in the drawings are for the purpose of illustrating unclaimed portions of the umbrella stand and form no part of the claimed design. 

CLAIM The ornamental design for an umbrella stand, as shown and described. 